In this undated photo provided by an anti-Bashar Assad activist group Edlib News Network (ENN), which has been authenticated based on its contents and other AP reporting, shows Jamal Maarouf, the head of the rebel Syrian Revolutionaries Front, holding a rifle, in Idlib province, northern Syria. The moderate Syrian rebels that Washington hopes will battle the Islamic State extremist group are hemorrhaging on multiple fronts. In a key battle earlier this month they rapidly collapsed in the face of an assault by al-Qaida fighters, with some rebels surrendering their weapons and others outright defecting to the extremists. (AP Photo/Edlib News Network ENN) (The Associated Press)

In this undated photo provided by an anti-Bashar Assad activist group, Edlib News Network (ENN), which has been authenticated based on its contents and other AP reporting, shows Jamal Maarouf, the head of the rebel Syrian Revolutionaries Front, holding a radio, in Idlib province, northern Syria. The...